update

src/lib/djstdlib/core.cpp

@@ -1,9 +1,12 @@
+#include <iostream>
+#include <ostream>
 #include <unistd.h> // TODO(djledda): get outta here
 #include <math.h>
 #include <string.h>
-#define STB_SPRINTF_IMPLEMENTATION
 #include "core.h"
 #include "os.cpp"
+#define STB_SPRINTF_IMPLEMENTATION
+#include "vendor/stb_sprintf.h"
 
 void *pushSize(Arena *arena, size_t bytes) {
     if (arena->capacity - arena->head >= bytes) {
@@ -30,6 +33,10 @@ void arenaFreeFrom(Arena *arena, size_t position) {
     arena->head = position;
 }
 
+void arenaPopTo(Arena *arena, void *position) {
+    arena->head = (byte *)position - (byte *)arena->memory;
+}
+
 Arena *scratchArenas[2];
 
 void initialiseCore() {

src/lib/djstdlib/core.h

@@ -60,6 +60,7 @@ void *pushSize(Arena *arena, size_t bytes);
 Arena *arenaAlloc(size_t capacity);
 void arenaFree(Arena *arena);
 void arenaFreeFrom(Arena *arena, size_t pos);
+void arenaPopTo(Arena *arena, void *pos);
 
 void initialiseCore();
 
@@ -209,8 +210,8 @@ void log(const char *fmt, ...);
 void logError(const char *fmt, ...);
 
 // ### Loops ###
-#define EachIn(list, it) size_t it = 0; it < list.length; it++
-#define EachInReversed(list, it) size_t it = list.length - 1; it >= 0 && it < list.length; it--
+#define EachIn(list, it) size_t it = 0; it < (list).length; it++
+#define EachInReversed(list, it) size_t it = (list).length - 1; it >= 0 && it < (list).length; it--
 #define EachInArray(arr, it)  size_t it = 0; it < ArrayCount(arr); ++it
 
 // ### Misc ###